.number-keyboard {
    background: #f0f0f2;
    width: 100%
}

.number-keyboard .key-area {
    width: 100%;
    height: 100%;
    font-size: 0
}

.number-keyboard .key-area .key {
    font-size: 32px;
    color: #000;
    display: inline-block;
    height: 54px;
    line-height: 54px;
    width: 33.33%;
    text-align: center;
    box-sizing: border-box;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    position: relative
}

.number-keyboard .key-area .key:before {
    border-right: 2px solid #8c8c8c;
    content: '';
    border-bottom: 2px solid #8c8c8c;
    -webkit-transform: scale(.5);
    transform: scale(.5);
    -webkit-transform-origin: 0 0;
    transform-origin: 0 0;
    width: 200%;
    height: 200%;
    position: absolute;
    left: 0;
    top: 0;
    pointer-events: none;
    box-sizing: border-box;
    z-index: 1
}

.number-keyboard .key-area .key:nth-of-type(3n):before {
    border-right: none
}

.number-keyboard .key-area .key:nth-of-type(10):before,.number-keyboard .key-area .key:nth-of-type(11):before {
    border-bottom: none
}

.number-keyboard .key-area .key:active {
    background: #d2d5db
}

.number-keyboard .key-area .key.backspace {
    background-image: url();background-position: center;
    background-size: 24px 18px;
    background-repeat: no-repeat
}

.number-keyboard .key-area .key.backspace,.number-keyboard .key-area .key.dot {
    background-color: #d2d5db
}

.number-keyboard .key-area .key.backspace:active,.number-keyboard .key-area .key.dot:active {
    background: #fff
}